Nut-lock.



E. E. TREVILLION.

NUT LOCK.

APPLIO IIIIIIIIIII 20 2a. 1912.

1,072,275. Patented Sept.2,1913.

Fries.

EDWARD E. TREVILLION, OF NEWELLTON, LOUISIANA.

NUT-LOCK.

Specification of Letters Patent.

vApplication filed December 28,1912.

Patented Sept. 2, J! 13.

Serial No. 739,117.

T 0 all whom it may concern Be it known that I, Enwann E. THEVIL- now, acitizen of the United States, residing at Newellton, in the parish of'lensasaml, State of Louisiana, have invented certain new and usefulImprovements in Nut-Locks, of which the following is a specification.

The object of the present invention is to provide a simple and effectiveform of nut lock which may be easily applied to any size or character ofbolt, with the aid of tools ordinarily used.

Heretofore, the common expedient of employing a cotterpin, which notonly requires an expensive operation of drilling a hole, but weakens theconstruction of the bolt, by so doing, was considered a fairly positivenut look, but the dil'l'iculty lay in the fact that the drilled hole hadto be in the proper place, thus necessitating special bolts and sizes,or the desired result was not obtainable.

It is, therefore, my object to provide a locking or wedging member, aportion of which is seated in a groove or notch made adjacent to andparallel with the face of the nut, which member is capable of beingquickly or positively applied to any style of bolt, at the proper place,by means of tools carried by a regular mechanic.

In the accompanying drawings, Figure 1 is a view in elevation of a boltshowing the locking member in operative position thereon. Fig. 2 is avertical sectional view, on the line 2-2 of Fig. 1. Fig. 3 is a top planview. Fig. t is a horizontal sectional view taken on the line 4t4; ofFig. 2. F 5 a view in elevation, showing more clearly the interlockinggroove, the locking member being omitted. Fig. 6 shows a slightlymodified form of locking member. Fig. 7 is a detail view of the lockingmember alone.

Referring to the drawings, the numeral 1 designates a bolt having thethreaded end port-ion 2 upon which is screwed a nut I). It is to beunderstood that these parts are common to the structure of every bolt,irrespective oi its size, and when the nut has been screwed upon itsplace tightly against the abutment, I take a hack-saw, thin file, orsimilar tool, and make a groove or notch t in the threaded portion,transversely oi the bolt 2, and immediately adjacent, as well asparallel to the face of the nut 3. Into this interlocking groove 4 Iplace the attenuated or flattened portion 5 of a piece of wire 5,

previously so flattened by a blow (it a ham mer or the like, the ends oithe wire being brought armmd the bolt, and secured to gether by twistingwith a pair of. pliers, as shown at (5. The twisted ends or the knot inthe ring binds against the face of the nut at the side of the boltopposite the groove and it is to be noted that the groove ispreitci'ably narrower than the gage ot' the thread. The enlargedportions of the wire ring 5 at the ends of the groove TJIOCllItlO ofthis member turning in either direction when once applied. Theftll'lllittlOll oil? the groove 4-, as before stated, at an angle to thethreads, causes the flattened portion of the ring member to act as awedge against tendency of the nut to unscrew when it has been applied ashereinbctore described, and likelihood of the locking ring following thepath of the threads when the nut 3 tends to move off the bolt, isprevented, this action being ordinarily ex mrienced where a ring lockingmember oi similar nature to the present invention is secured around thethreaded portion of the bolt without any interlocking connectiontherewith.

It will be obvious that to provide the bolt with the groove t does notinjure or in any *ay destroy its usefulness, nor does it weaken thebolt. The :ulvantages of my construction of nut lock are apparent inthat a very effective one is provided, at a minimum expense, and for anysize or style of bolt.

In Fig. (3 is illustrated a slightly modified form of locking member 5,which is not provided with an attenuated portion, as in the preferredform, but is merely engaged in a similar groove -t, cut in the threadedportion 2 oi the bolt '1, adjacent the nut 23 as hercinbeforc describedwith respect to the preferred term. The interlocking action is just asetl'ective in this modified form but the flattening oi the ring memberincreases. in an apparent manner the wcdging action of said men'lber. Itwill, 'lurthermorc, be understood that should it become necessary toscrew the nut upon the bolt tighter, in such a manner that space wouldbe left between the locking member and the nut, it would only benecessary to pass the wire 5 around the bolt a second time between thefirst turn which lies in the groove, or as many other turns as might berequired to till the inter vening space described. This would preventthe necessity oi? making a new groove adjacent to the nut and still thelocking action would be just as effective. In tightening the nut, itwould even be practicable instead of continuing the wrapping of the wireas just described around the bolt, to allow the locking ring 5 to remainin its position and to fill the intervening space between said ring andthe nut by using an additional piece of wire and twisting it tightly.

Having thus described my invention, what I claim as new is:

1. In a nut lock, the combination with a bolt having a threaded portionand a nut adapted to be screwed thereupon, said bolt having a groove inthe threaded portion adjacent the nut and formed at right angles to theaxis of said bolt, the width of the groove aforesaid being narrower thanthe gage of the threads on the bolt, of a locking ring member ofrelatively hard material and of less diameter than the bolt, securedaround said bolt and having a portion seated in the groove whereby toprevent tendency of the ring member to follow the thread on unscrewingmovement of the nut.

2. In a nut lock, the combination with a threaded bolt and a nuttherefor, the bolt having a groove in its threaded portion adjacent thenut and at right angles to the axis of the bolt, of a locking ring ofless diameter than the diameter of the bolt and formed with anattenuated portion adapted to seat in the groove aforesaid the enlargedportions of the ring at the ends of the groove forming wedges to preventturning of the locking member.

In testimony whereof I ailiX my signature in presence of two witnesses.

EDWARD E. TREVILLION.

Witnesses:

E. S. MILLER, T. E. GRACE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of E'atents, Washington, D. G.

